A sealing assembly, electric drive assembly and vehicle

Abstract

The utility model provides a kind of sealing assembly, electric drive assembly and vehicle, it is related to vehicle technical field, sealing assembly includes output shaft and plugging piece, the output shaft is equipped with the shaft hole being penetrated along its axial direction and being used to with half shaft plug-in cooperation, the plugging piece is located in the shaft hole, and with the hole wall of the shaft hole sealing connection, and the plugging piece is equipped with annular groove, the annular groove is set to the axial end surface of the plugging piece and extends along the circumference of the plugging piece.This way, when plugging piece and the hole wall of shaft hole are welded using for example electron beam welding, plugging piece can be deformed under the action of annular groove, to offset the welding stress that plugging piece is subjected to in welding process to the base material stretch, so that welding crack can be prevented, improve weld quality, to ensure that output shaft has reliable self-sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and more specifically, to a sealing component, an electric drive assembly, and a vehicle. Background Technology

[0002] In the electric drive systems of new energy vehicles, lubricating oil is typically used to lubricate and cool transmission components such as input shafts, output shafts, and transmission gears to improve the stability of the electric drive system. However, in distributed electric drive systems, since the traditional differential is eliminated, the output shaft of the reducer is directly connected to the half-shaft to transmit power to the wheels. Therefore, the output shaft needs to be sealed to prevent lubricating oil leakage. Currently, the main sealing methods for output shafts are non-self-sealing and self-sealing configurations. Non-self-sealing configurations typically connect the oil seal to the half-shaft, which can easily scratch the oil seal lip during half-shaft assembly, affecting the sealing reliability. Self-sealing configurations typically use a press-fitted cup-shaped plug, which uses the interference contact surface of the cup-shaped plug for sealing. However, the cup-shaped plug is prone to creep in the later stages, leading to seal failure. Utility Model Content The problem this invention addresses is: how to improve the sealing effect of the output shaft.

[0003] To address the aforementioned problems, this utility model provides a sealing component, an electric drive assembly, and a vehicle.

[0004] In a first aspect, the present invention provides a sealing assembly, including an output shaft and a sealing member. The output shaft has a shaft hole that extends through it along its axial direction and is used for insertion and mating with a half shaft. The sealing member is disposed in the shaft hole and is sealed to the hole wall of the shaft hole. The sealing member has an annular groove, which is disposed on the axial end face of the sealing member and extends circumferentially along the sealing member.

[0005] Optionally, the annular groove is located on the end face of the sealing member away from the half-shaft.

[0006] Optionally, the hole wall of the shaft hole is provided with a limiting boss, which is located on the side of the sealing member close to the half shaft and abuts against the sealing member axially.

[0007] Optionally, the sealing member has a circular plate-shaped structure, the diameter D of the sealing member and the outer diameter D1 of the annular groove satisfy D-D1≤6mm, and the outer diameter D1 of the annular groove and the inner diameter D2 of the annular groove satisfy D1-D2≥8mm. And / or, the thickness t of the sealing member at the annular groove satisfies 0 < t ≤ 1.8 mm.

[0008] Optionally, the sealing assembly further includes a housing and an oil seal. The housing has a through hole, the output shaft is disposed inside the housing and one end is inserted into the through hole and connected to the half shaft, and the oil seal is sleeved on the outside of the output shaft and is sealed to the wall of the through hole.

[0009] Optionally, the output shaft includes a shaft body and a gear coaxially connected, and the shaft hole extends through the shaft body axially; the gear includes a spoke portion and a meshing portion arranged around the spoke portion, the spoke portion includes a first spoke and a second spoke arranged alternately in the circumferential direction, the first spoke and the second spoke are respectively formed by a local portion of the spoke portion recessed along the axial direction of the spoke portion, and the recess directions of the first spoke and the second spoke are opposite.

[0010] Optionally, the shaft body is provided with a first shoulder, the width of the meshing portion is greater than the width of the spoke portion, the first shoulder is located at the end of the spoke portion away from the half shaft, and the first shoulder is located axially between the end faces of the meshing portion and the spoke portion near the first shoulder, wherein the axial dimensions of the meshing portion and the spoke portion are the widths of the meshing portion and the spoke portion, respectively.

[0011] Optionally, the shaft body is further provided with a second shoulder, the second shoulder being located between the spoke portion and the oil seal, and the sealing member being located between the first shoulder and the second shoulder.

[0012] Secondly, this utility model provides an electric drive assembly, including the sealing component as described above.

[0013] Thirdly, this utility model provides a vehicle including the electric drive assembly described above.

[0014] The beneficial effects of the sealing component of this utility model are as follows: The output shaft can be sealed by setting a sealing element in the shaft hole for insertion with the half-shaft, preventing lubricating oil in the reducer housing from leaking at the shaft hole. Furthermore, by opening a circumferentially oriented annular groove on the axial end face of the sealing element, the sealing element can deform under the action of the annular groove when welded to the shaft hole wall using methods such as electron beam welding. This counteracts the welding stress on the base material during welding, preventing welding cracks, improving weld quality, and thus enhancing the sealing effect of the sealing element on the shaft hole, ensuring reliable self-sealing performance of the output shaft. This allows the manufactured electric drive system to be lubricated and transported to the vehicle assembly base for assembly, eliminating the need for a lubricating oil filling process and storage space at the vehicle assembly base. This simplifies the production process, reduces costs, and also reduces the risk of foreign matter entering the electric drive components with the lubricating oil during lubrication at the vehicle assembly base, thereby improving the overall production quality of the vehicle. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the sealing assembly in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the sealing component in an embodiment of the present invention; Figure 3 This is a cross-sectional schematic diagram of the sealing component in an embodiment of this utility model; Figure 4 This is a cross-sectional view of the output shaft in an embodiment of the present invention; Figure 5 This is a schematic diagram of the output shaft in an embodiment of the present invention; Figure 6 This is a structural schematic diagram of the output shaft from another perspective in an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached figures: 1. Output shaft; 11. Shaft body; 12. Gear; 121. Spoke section; 1211. First spoke; 1212. Second spoke; 1213. Weight reduction hole; 122. Meshing part; 13. Shaft hole; 14. Limiting boss; 15. First shoulder; 16. Second shoulder; 17. Internal spline; 18. Slot; 2. Sealing component; 21. Annular groove; 3. Housing; 31. Through hole; 32. First housing; 33. Middle housing; 34. Second housing; 4. Oil seal; 500. Half shaft; 600. First bearing; 700. Second bearing. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0018] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0019] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0020] In related technologies, in distributed electric drive systems, the traditional differential is eliminated, allowing the reducer's output shaft to be directly connected to the half-shaft to transmit power to the wheels. Therefore, the output shaft needs to be sealed to prevent lubricant leakage. Output shaft sealing methods mainly include non-self-sealing and self-sealing configurations. Non-self-sealing methods typically connect the oil seal to the half-shaft, but the oil seal lip is easily scratched during half-shaft assembly, affecting its sealing reliability. Self-sealing methods usually employ a press-fitted cup-shaped plug, utilizing the interference fit of the cup-shaped plug for sealing. However, the cup-shaped plug is prone to creep later on, leading to seal failure.

[0021] To address the problems existing in the aforementioned related technologies, this utility model provides a sealing component, an electric drive assembly, and a vehicle.

[0022] Combination Figure 1 and Figure 2As shown, a sealing assembly according to an embodiment of the present invention includes an output shaft 1 and a sealing member 2. The output shaft 1 has a shaft hole 13 that extends through it along its axial direction and is used for insertion and mating with a half shaft 500. The sealing member 2 is disposed in the shaft hole 13 and is sealed to the hole wall of the shaft hole 13. The sealing member 2 is provided with an annular groove 21, which is disposed on the axial end face of the sealing member 2 and extends along the circumference of the sealing member 2.

[0023] Specifically, the output shaft 1 has a hollow shaft structure with both axial ends open. The internal space of the hollow shaft structure forms a shaft hole 13. One end of the half-shaft 500 is inserted into the shaft hole 13 of the output shaft 1 and is connected to the output shaft 1 for transmission. The other end of the half-shaft 500 is connected to the wheel to transmit the torque of the output shaft 1 to the wheel, driving the vehicle. The sealing member 2 can be a circular plug and is disposed in the shaft hole 13 of the output shaft 1. The circumferential surface of the sealing member 2 and the hole wall of the shaft hole 13 can be sealed by means of welding, for example, or by means of a sealing ring. In practical applications, welding is usually used to fix the sealing member 2 in the shaft hole 13 and seal the shaft hole 13 to improve the reliability of the connection between the output shaft 1 and the sealing member 2, reduce the number of parts, and reduce the assembly difficulty. The axial end face of the sealing component 2 is provided with an annular groove 21, and the central axis of the annular groove 21 coincides with the central axis of the sealing component 2, that is, the annular groove 21 is provided on the axial end face of the sealing component 2 along the circumference of the sealing component 2. The annular groove 21 can be provided on the end face of the sealing component 2 near the half shaft 500 or on the end face of the sealing component 2 away from the half shaft 500, and no specific limitation is made here.

[0024] In this embodiment, the output shaft 1 can be sealed by providing a sealing member 2 in the shaft hole 13 of the output shaft 1 for insertion and mating with the half shaft 500, so as to prevent the lubricating oil in the reducer housing from leaking at the shaft hole 13 of the output shaft 1. Moreover, by opening an annular groove 21 arranged circumferentially on the axial end face of the sealing member 2, when the sealing member 2 is welded to the hole wall of the shaft hole 13 by means of, for example, electron beam welding, the sealing member 2 can undergo a certain deformation under the action of the annular groove 21, so as to offset the welding stress that the sealing member 2 is subjected to in the welding process, thereby preventing welding cracks, improving the weld quality, and further improving the sealing effect of the sealing member 2 on the shaft hole 13, ensuring that the output shaft 1 has reliable self-sealing performance. This allows the completed electric drive system to be transported to the vehicle assembly plant after being filled with lubricating oil, eliminating the need for additional lubrication processes and storage space at the vehicle assembly plant. This simplifies the production process, reduces costs, and also reduces the risk of foreign matter entering the electric drive components with the lubricating oil during lubrication at the vehicle assembly plant, thereby improving the overall production quality of the vehicle.

[0025] Furthermore, combined Figure 1 and Figure 4 As shown, the bore wall of the shaft hole 13 is provided with an internal spline 17, and the output shaft 1 is splined to the half shaft 500 inserted into the shaft hole 13 through the internal spline 17. In this way, the output shaft 1 and the half shaft 500 form a transmission connection, thereby transmitting torque to the half shaft 500, and then to the wheels, driving the vehicle to move.

[0026] Optionally, combined Figure 1 As shown, the annular groove 21 is located on the end face of the sealing member 2 at the end away from the half shaft 500.

[0027] Since the internal spline 17 of the shaft hole 13 is located on the side of the sealing member 2 closer to the half shaft 500, in order to avoid affecting the internal spline 17 when welding the sealing member 2, electron beam welding is usually performed on the end of the sealing member 2 away from the half shaft 500. This makes the end of the sealing member 2 away from the half shaft 500 prone to welding cracks. Therefore, in this optional embodiment, by setting the annular groove 21 on the end face of the sealing member 2 away from the half shaft 500, it is ensured that the sealing member 2 can better deform during the welding process to offset the welding stress stretched towards the base material, thereby improving the weld quality and sealing effect.

[0028] Optionally, combined Figure 1 and Figure 4 As shown, the hole wall of the shaft hole 13 is provided with a limiting boss 14. The limiting boss 14 is located on the side of the sealing member 2 near the half shaft 500 and abuts against the sealing member 2 axially.

[0029] In this optional embodiment, the axial abutment between the limiting boss 14 and the sealing member 2 can be understood as the end face of the sealing member 2 away from the half-shaft 500 abutting against the limiting boss 14. The limiting boss 14 can be a continuous circular annular boss structure, or it can be composed of multiple bosses evenly distributed circumferentially; no specific limitation is made here. In this way, the limiting boss 14 can be used to install and position the sealing member 2 before welding. This ensures accurate welding position of the sealing member 2 and prevents axial shaking of the sealing member 2 during welding, thereby improving welding quality and sealing effect. Furthermore, the limiting boss 14 can also enhance the structural strength at the welding position between the sealing member 2 and the output shaft 1, further reducing the risk of fatigue fracture at the weld.

[0030] Optionally, combined Figure 3As shown, the sealing element 2 has a circular plate-like structure. The diameter D of the sealing element 2 and the outer diameter D1 of the annular groove 21 satisfy D-D1≤6mm, and the outer diameter D1 and the inner diameter D2 of the annular groove 21 satisfy D1-D2≥8mm. The difference between the outer diameter D1 and the inner diameter D2 of the annular groove 21 also represents the width of the annular groove 21.

[0031] When the difference between the outer diameter D1 and the inner diameter D2 of the annular groove 21 is set too small, for example, less than 8mm, the groove width of the annular groove 21 will be small, making it difficult for the sealing component 2 to deform during welding. Moreover, when the difference between the diameter D of the sealing component 2 and the outer diameter D1 of the annular groove 21 is set too large, for example, greater than 6mm, the welding position of the sealing component 2 and the output shaft 1 will be far from the annular groove 21. Consequently, the parts of the sealing component 2 that are prone to deformation will be far from the welding position, making it easy for welding cracks to occur at the welding position because the deformation of the sealing component 2 is too small to offset the welding stress. Therefore, in this optional embodiment, the difference between the outer diameter D1 and the inner diameter D2 of the annular groove 21 is set to be greater than or equal to 8mm, i.e., D1-D2≥8mm, and the difference between the diameter D of the sealing member 2 and the outer diameter D1 of the annular groove 21 is set to be less than or equal to 6mm, i.e., D-D1≤6mm, so as to ensure that the sealing member 2 can deform during the welding process, and the amount of deformation generated can offset the welding stress, thereby improving the welding quality and sealing effect.

[0032] Optionally, combined Figure 3 As shown, the thickness t of the sealing component 2 at the annular groove 21 satisfies 0 < t ≤ 1.8 mm.

[0033] When t is set too large, for example, greater than 1.8 mm, the welding deformation of the sealing component 2 at the annular groove 21 is too small to offset the welding stress, which can easily lead to welding cracks. Therefore, in this optional embodiment, by setting the thickness t to 0 < t ≤ 1.8 mm, the annular groove 21 will not penetrate the end face of the sealing component 2 near the half-shaft 500, so that the end of the sealing component 2 near the half-shaft 500 is a closed structure, which can seal the shaft hole 13. At the same time, it ensures that the welding deformation of the sealing component 2 at the annular groove 21 can offset the welding stress, thereby improving the welding quality and sealing effect.

[0034] Optionally, combined Figure 1 As shown, the sealing assembly also includes a housing 3 and an oil seal 4. The housing 3 has a through hole 31. The output shaft 1 is located inside the housing 3 and one end is inserted into the through hole 31 and connected to the half shaft 500. The oil seal 4 is sleeved on the outside of the output shaft 1 and is sealed to the hole wall of the through hole 31.

[0035] In this way, by providing a through hole 31 on the housing 3, the output shaft 1 can be connected to the half shaft 500 at the through hole 31; moreover, by providing an oil seal 4 in the through hole 31 and sleeved on the output shaft 1, the oil seal 4 can seal the connection between the output shaft 1 and the housing 3, preventing the lubricating oil in the housing 3 from leaking at the through hole 31. At the same time, it can also avoid scratching the sealing lip of the oil seal 4 when assembling the half shaft 500, thereby ensuring that the oil seal 4 can play a better sealing role and improving the sealing effect between the output shaft 1 and the housing 3.

[0036] Furthermore, the housing 3 includes a first housing 32, a middle housing 33, and a second housing 34 that are detachably connected axially. The first housing 32 and the middle housing 33 form a first cavity, and the second housing 34 and the middle housing 33 form a second cavity. Two output shafts 1 are respectively disposed in the first cavity and the second cavity, and are respectively connected to two half-shafts 500 for transmission. Specifically, the oil seal 4 fitted onto the output shaft 1 housed in the first cavity is located within a through hole 31 on the first housing 32, and the oil seal 4 fitted onto the output shaft 1 housed in the second cavity is located within a through hole 31 on the second housing 34. Thus, by designing the housing 3 as a split structure comprising the first housing 32, the middle housing 33, and the second housing 34, it is easier to manufacture the large housing 3 in sections, thereby reducing manufacturing difficulty and production mold costs. Simultaneously, by connecting the two output shafts 1 to the two half-shafts 500 respectively, torque is transmitted to the wheels located on the left and right sides of the vehicle, thereby driving the vehicle.

[0037] Furthermore, the two ends of the output shaft 1 located in the first cavity are connected to the middle housing 33 and the first housing 32 respectively via the first bearing 600 and the second bearing 700, and the two ends of the output shaft 1 located in the second cavity are connected to the middle housing 33 and the second housing 34 respectively via the first bearing 600 and the second bearing 700. In this way, the housing 3 supports the output shaft 1.

[0038] Optionally, combined Figure 4 and Figure 5 As shown, the output shaft 1 includes a shaft body 11 and a gear 12 coaxially connected, and a shaft hole 13 passes through the shaft body 11 axially. The gear 12 includes a spoke portion 121 and a meshing portion 122 arranged around the spoke portion 121. The spoke portion 121 includes a first spoke 1211 and a second spoke 1212 arranged alternately in the circumferential direction. The first spoke 1211 and the second spoke 1212 are respectively formed by a partial portion of the spoke portion 121 recessed along the axial direction of the spoke portion 121, and the recess directions of the first spoke 1211 and the second spoke 1212 are opposite.

[0039] In this optional embodiment, the output shaft 1 is a gear shaft structure, and the gear 12 of the gear shaft structure is usually located in the middle of the shaft body 11, so as to facilitate the connection of the two ends of the shaft body 11 to the housing 3 through bearings to support the output shaft 1. The meshing portion 122 of the gear 12 is provided with an external tooth structure for meshing with the transmission gear. The spoke portion 121 of the gear 12 is provided with a first spoke 1211 and a second spoke 1212 alternating in the circumferential direction. The first spoke 1211 and the second spoke 1212 are formed by stamping. Specifically, the first spoke 1211 is formed by a partial portion of the spoke portion 121 recessed from the first end to the second end of the spoke portion 121, and the second spoke 1212 is formed by a partial portion of the spoke portion 121 recessed from the second end to the first end of the spoke portion 121. That is, the recessing direction (or stamping direction) of the first spoke 1211 and the second spoke 1212 are opposite. The first end and the second end of the spoke portion 121 are the two ends of the spoke portion 121 along the axial direction. This results in the spoke portion 121 of the gear 12 having a convex-concave structure with multiple concave portions and multiple convex portions alternating in the circumferential direction. This allows for the reduction of the material thickness of the spoke portion 121 while ensuring the structural strength of the spoke portion 121, thereby reducing the weight and manufacturing cost of the output shaft 1.

[0040] Optionally, the thickness of the first spoke 1211 and the second spoke 1212 is less than or equal to 11.5 mm.

[0041] When the thickness of the first spoke 1211 and the second spoke 1212 is set too large, for example, greater than 11.5 mm, it not only increases the difficulty of stamping the first spoke 1211 and the second spoke 1212, thus increasing the processing difficulty of the output shaft 1, but also results in a larger weight for the gear 12 and even the output shaft 1, thereby increasing production costs. Therefore, in this optional embodiment, the thickness of the first spoke 1211 and the second spoke 1212 is set to be less than or equal to 11.5 mm to reduce the processing difficulty and weight of the output shaft 1.

[0042] Furthermore, combined Figure 5 As shown, the first spoke 1211 and the second spoke 1212 are respectively provided with weight reduction holes 1213. This is to facilitate the lightweight design of the output shaft 1.

[0043] Optionally, combined Figure 1 , Figure 4 and Figure 6As shown, the shaft body 11 is provided with a first shoulder 15. The width of the meshing portion 122 is greater than the width of the spoke portion 121. The first shoulder 15 is located at the end of the spoke portion 121 away from the half shaft 500. The first shoulder 15 is located axially between the end faces of the meshing portion 122 and the spoke portion 121 near the end of the first shoulder 15. The axial dimensions of the meshing portion 122 and the spoke portion 121 are the widths of the meshing portion 122 and the spoke portion 121, respectively.

[0044] In this optional embodiment, the output shaft 1 is provided with a first shoulder 15 for axial positioning and limiting of the first bearing 600, that is, the first bearing 600 is assembled at the first shoulder 15 of the output shaft 1. Meanwhile, by setting the width of the meshing portion 122 to be greater than the width of the spoke portion 121, the meshing area of ​​the gear 12 is increased, allowing the output shaft 1 to better transmit torque. Furthermore, the first shoulder 15 is located between the end faces of the meshing portion 122 and the spoke portion 121 near the end of the first shoulder 15, that is, the first shoulder 15 is hidden within the width range of the gear 12. This allows a portion of the first bearing 600 to be accommodated within the space enclosed by the meshing portion 122 and the spoke portion 121, thereby shortening the overall length of the output shaft 1 and facilitating its arrangement.

[0045] Optionally, combined Figure 1 , Figure 4 and Figure 5 As shown, the shaft body 11 is also provided with a second shaft shoulder 16, which is located between the spoke portion 121 and the oil seal 4, and the sealing member 2 is located between the first shaft shoulder 15 and the second shaft shoulder 16.

[0046] In this optional embodiment, the output shaft 1 is provided with a second shoulder 16 for axial positioning and limiting of the second bearing 700. That is, the second bearing 700 is assembled at the second shoulder 16 of the output shaft 1 and is located between the spoke portion 121 and the oil seal 4. Moreover, by placing the sealing member 2 between the first shoulder 15 and the second shoulder 16, the welding position of the sealing member 2 is located between the first shoulder 15 and the second shoulder 16, avoiding deformation of the parts of the output shaft 1 used to assemble the first bearing 600 and the second bearing 700 when welding the sealing member 2, thereby ensuring that the first bearing 600 and the second bearing 700 can be smoothly assembled at the first shoulder 15 and the second shoulder 16, respectively.

[0047] Furthermore, combined Figure 4As shown, the hole wall of the shaft hole 13 is provided with a groove 18, which is used to engage with a snap-fit ​​component sleeved on the half-shaft 500. The groove 18 can be an annular groove structure. Correspondingly, the outer peripheral wall of the half-shaft 500 has an annular mounting groove corresponding to the groove 18, and a snap-fit ​​component, such as a C-shaped retaining spring, is installed at the annular mounting groove. During the process of inserting the half-shaft 500, along with the snap-fit ​​component, into the shaft hole 13 of the output shaft 1, the half-shaft 500 is installed in place when the snap-fit ​​component engages with the groove 18. This improves the convenience of assembling the half-shaft 500 and the output shaft 1, and also utilizes the snap-fit ​​action of the groove 18 and the snap-fit ​​component to axially limit the half-shaft 500, preventing it from dislodging from the shaft hole 13 of the output shaft 1, thereby ensuring the reliability of the connection between the output shaft 1 and the half-shaft 500.

[0048] An electric drive assembly according to an embodiment of the present invention includes the sealing component as described above.

[0049] The beneficial effects of the electric drive assembly in this embodiment are the same as those of the sealing assembly described above, and will not be repeated here.

[0050] A vehicle according to an embodiment of the present invention includes the electric drive assembly described above.

[0051] The beneficial effects of the vehicle in this embodiment are the same as those of the electric drive assembly described above, and will not be repeated here.

[0052] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A sealing assembly, characterized in that, The device includes an output shaft (1) and a sealing member (2). The output shaft (1) has a shaft hole (13) that extends through it along its axial direction and is used for insertion and mating with a half shaft (500). The sealing member (2) is disposed in the shaft hole (13) and is sealed to the hole wall of the shaft hole (13). The sealing member (2) has an annular groove (21) that is disposed on the axial end face of the sealing member (2) and extends along the circumference of the sealing member (2).

2. The sealing assembly according to claim 1, characterized in that, The annular groove (21) is located on the end face of the sealing member (2) away from the half shaft (500).

3. The sealing assembly according to claim 1, characterized in that, The hole wall of the shaft hole (13) is provided with a limiting boss (14), which is located on the side of the sealing member (2) close to the half shaft (500) and abuts against the sealing member (2) axially.

4. The sealing assembly according to claim 1, characterized in that, The sealing element (2) has a circular plate structure. The diameter D of the sealing element (2) and the outer diameter D1 of the annular groove (21) satisfy D-D1≤6mm, and the outer diameter D1 of the annular groove (21) and the inner diameter D2 of the annular groove (21) satisfy D1-D2≥8mm. And / or, the thickness t of the sealing element (2) at the annular groove (21) satisfies 0 < t ≤ 1.8 mm.

5. The sealing assembly according to claim 1, characterized in that, It also includes a housing (3) and an oil seal (4). The housing (3) has a through hole (31). The output shaft (1) is located inside the housing (3) and one end is inserted into the through hole (31) and connected to the half shaft (500). The oil seal (4) is sleeved on the outside of the output shaft (1) and is sealed to the hole wall of the through hole (31).

6. The sealing assembly according to claim 5, characterized in that, The output shaft (1) includes a shaft body (11) and a gear (12) coaxially connected, and the shaft hole (13) passes through the shaft body (11) axially. The gear (12) includes a spoke portion (121) and a meshing portion (122) arranged around the spoke portion (121). The spoke portion (121) includes a first spoke (1211) and a second spoke (1212) arranged alternately in the circumferential direction. The first spoke (1211) and the second spoke (1212) are respectively formed by a partial portion of the spoke portion (121) recessed along the axial direction of the spoke portion (121), and the recess directions of the first spoke (1211) and the second spoke (1212) are opposite.

7. The sealing assembly according to claim 6, characterized in that, The shaft body (11) is provided with a first shoulder (15). The width of the meshing part (122) is greater than the width of the spoke part (121). The first shoulder (15) is located at the end of the spoke part (121) away from the half shaft (500). The first shoulder (15) is located axially between the end faces of the meshing part (122) and the spoke part (121) near the end of the first shoulder (15). The axial dimensions of the meshing part (122) and the spoke part (121) are the widths of the meshing part (122) and the spoke part (121), respectively.

8. The sealing assembly according to claim 7, characterized in that, The shaft body (11) is also provided with a second shoulder (16), which is located between the spoke portion (121) and the oil seal (4), and the sealing member (2) is located between the first shoulder (15) and the second shoulder (16).

9. An electric drive assembly, characterized in that, Includes the sealing assembly as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, Includes the electric drive assembly as described in claim 9.

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